Creating a Starter Site - Custom Functions - Security

cfsecurity.php

<?php
   /*
   Plugin Name: Custom Security Functions
   Plugin URI: https://nathaningram.com
   Description: Security Hardening for Core WordPress
   Version: 2023.11
   Author: Nathan Ingram
   Author URI: https://nathaningram.com
   License: GPL2
   */


// Security Check

if (!defined('ABSPATH')) {
    die();
}

// Suppress Login Errors 
function ni_suppress_login_errors(){
    return 'Something went wrong - please check your username or password';
}
add_filter('login_errors', 'ni_suppress_login_errors');


// Prevent User Enumeration
function ni_stop_author_enumeration($redirect, $request) {
    if (preg_match('/author=([0-9]*)(\/*)/i', $request)) {
        wp_redirect(home_url(), 301);
        exit;
    }
    return $redirect;
}
add_filter('redirect_canonical', 'ni_stop_author_enumeration', 10, 2);


// Disable Post by Email

add_filter( 'enable_post_by_email_configuration', '__return_false', 100 );